[单项选择]Prohibition in the United States ushered in an era of crime and corruption.


A. introduced
B. caused
C. used
D. upset

[单项选择]The United States is composed of fifty states, two of ______are separated from the others by land or water.
A. them
B. that
C. which
D. those

[单项选择]After 1850,various states in the United States began to pass compulsory school attendance laws.
A. harsh
B. diversified
C. mandatory
D. complicated

[单项选择]The United States bought Louisiana from


A. France
B. Spain
C. Britain
D. Mexico

[单项选择]

The United States government publishes guidelines for appropriate nutrient intakes These are known as the Recommended Dietary Allowances (RDAs) and are updated regularly based on new research in the science of nutrition. RDAs are suggested amounts of calories, protein, and some minerals and vitamins for an adequate diet. For other dietary substances, specific goals must await further research. However, for the U.S. population as a whole, increasing starch and fiber in our diets and reducing calories (primarily from fats, sugar, and alcohol) is sensible. These suggestions are especially appropriate for people who have other factors for chronic diseases such as family history of obesity, premature heart disease, diabetes, high blood pressure, and high blood cholesterol, or for those who use tobacco. Snacks can furnish about one-fourth of the calorie requirements among teenagers Those snacks should also furnish much of the day's allowances for protein, minerals, and vitamins. Sa
A. protein
B. fats
C. starch and fiber
D. sandwiches

[单项选择]The United States is composed of 50 states , two of which are separated from ______ by land or water.


A. others
B. other one
C. the others
D. another

[单项选择]The United States (is composed) of fifty states, (two of those) are (separated from) (the others) by land or water.
A. is composed
B. two of those
C. separated from
D. the others

[单项选择]In the United States community colleges offer
A. D．B. or B.S.degrees

[单项选择]The United States Declaration of Independence was drafted and signed in

[单项选择]How many states are there in the United States


A. Thirteen.
B. Fifty.
C. Fifty one.
D. Sixty.

[单项选择]Throughout the United States, insurance laws follow a general pattern although______ are different from state to state.


A. provisions
B. contracts
C. treaties
D. regulations

[单项选择]

Relations between the United States and Colombia suffered for many years because of an incident involving the Republic of Panama. By the en& of the Spanish-American War, Americans felt that an easier and faster: way was needed to ,get ships, from the Atlantic Ocean to the Pacific Ocean. Some people in the United States first believed that a canal across Nicaragua was the answer. However, President Theodore Roosevelt decided that a canal through Panama would be a better choice, In order to build the canal, the United States had to negotiate a treaty with Colombia, which at that time controlled Panama. Roosevelt offered Colombia, $10 million plus $ 250,000 a year for 99 years for a six-miles-wide strip of land across Panama. Colombia rejected the United States’offer. This angered President Roosevelt, and negotiations with Colombia, ended. In 1903，a revolution broke out in Panama. United States ships were sent by President: Roosevelt to protect the Panamanian revolutionari
A. wanted to build a canal because it was considering starting a war
B. built a canal through Panama at the risk of ruining relations with, Colombia
C. believed that a canal through Nicaragua would be profitable
D. had lost the Spanish-American War